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1.25Gbps 80km CWDM SFP Transceiver

1.25Gbps 80km CWDM SFP Transceiver

Features

* Data-rate of 1.25Gbps operation

* 18 CWDM DFB wavelengths laser and PIN photodetector for 80km transmission

* Compliant with SFP MSA and SFF-8472 with duplex LC receptacle

* Digital Diagnostic Monitoring: Internal Calibration or External Calibration

* Compatible with SONET OC-24-LR-1

* Compatible with RoHS

* +3.3V single power supply

* Operating case temperature: Standard 0 to +70°C, Industrial -40 to 85°C

Applications

* Gigabit Ethernet

* Fiber Channel

* Switch to Switch interface

* Switched backplane applications

* Router/Server interface

* Other optical transmission systems

Description

The SFP transceivers are high performance, cost effective modules supporting data-rate of 1.25Gbps and 80km transmission distance with SMF.

The transceiver consists of three sections: a uncooled CWDM DFB laser transmitter, a PIN photodiode integrated with a trans-impedance preamplifier (TIA) and MCU control unit. All modules satisfy class I laser safety requirements.

The transceivers are compatible with SFP Multi-Source Agreement (MSA) and SFF-8472. For further information, please refer to SFP MSA.

Absolute Maximum Ratings

Table 1 - Absolute Maximum Ratings

Parameter	Symbol	Min	Max	Unit
Supply Voltage	Vcc	-0.5	4.5	V
Storage Temperature	Ts	-40	+85	°C
Operating Humidity	-	5	85	%

Recommended Operating Conditions

Table 2 - Recommended Operating Conditions

Parameter		Symbol	Min	Typical	Max	Unit
Operating Case Temperature	Standard	Tc	0		+70	°C
Power Supply Voltage		Vcc	3.13	3.3	3.47	V
Power Supply Current		Icc			300	mA
Data Rate				1.25		Gbps

Table3 -λC Wavelength Guide

λC Wavelength Guide
Code	λC	Unit	Code	λC	Unit	Code	λC	Unit	Code	λC	Unit
27	1270	nm	37	1370	nm	47	1470	nm	57	1570	nm
29	1290	nm	39	1390	nm	49	1490	nm	59	1590	nm
31	1310	nm	41	1410	nm	51	1510	nm	61	1610	nm
33	1330	nm	43	1430	nm	53	1530	nm
35	1350	nm	45	1450	nm	55	1550	nm

Optical and Electrical Characteristics

Table 4 - Optical and Electrical Characteristics

Parameter		Symbol		Min	Typical	Max	Unit	Notes
Transmitter
Centre Wavelength			λc	λc-6.5	λc	λc+6.5	nm
Spectral Width (-20dB)			∆λ			1	nm
Side Mode Suppression Ratio			SMSR	30			dB
Average Output Power			Pout	0		5	dBm	1
Extinction Ratio			ER	9			dB
Optical Rise/Fall Time (20%~80%)			tr/tf			0.26	ns
Data Input Swing Differential			V_IN	400		1800	mV	2
Input Differential Impedance			Z_IN	90	100	110	Ω
TX Disable	Disable			2.0		Vcc	V
TX Disable	Enable			0		0.8	V
TX Fault	Fault			2.0		Vcc	V
TX Fault	Normal			0		0.8	V
Receiver
Receiver Sensitivity						-23	dBm	3
Receiver Overload				-3			dBm	3
LOS De-Assert			LOS_D			-24	dBm
LOS Assert			LOS_A	-30			dBm
LOS Hysteresis				1		4	dB
Data Output Swing Differential			Vout	370		1800	mV	4
LOS			High	2.0		Vcc	V
LOS			Low			0.8	V